Some LSP clients, such as Eglot, understand and bind default actions to specific refactorings, such as extracting constants and functions.

Microsoft documentation references these specific kinds of refactorings here:
https://code.visualstudio.com/docs/editing/refactoring#_keyboard-shortcuts-for-code-actions

Currently, typescript-language-server seems to announce such refactorings as just "kind":"refactor".